What mechanism is formed when the slider is fixed in a single slider four-bar linkage?

• A. Hand pump
• B. Reciprocating engine
• C. Quick return
• D. Oscillating cylinder

Answer: (A)

When the slider is fixed in a single slider four-bar linkage, the mechanism that is formed typically resembles a hand pump. In this configuration, the fixed slider serves as a stationary reference point, while the other components of the four-bar linkage move relative to it, transforming linear motion into a reciprocating motion that is characteristic of hand pumps.

This mechanism utilizes the conversion of circular motion from the driving link into linear motion of the slider, effectively mimicking the operation of a hand pump where a handle is turned to move a piston or slider back and forth, drawing in fluid and then expelling it.

Other options like a reciprocating engine, quick return, and oscillating cylinder have their specific applications and workings but do not directly describe the scenario of a fixed slider in a four-bar mechanism. The correct understanding of how the single slider four-bar linkage operates reveals why a hand pump is the most fitting description.